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97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <functional>
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// class function<R(ArgTypes...)>
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// template<typename T>
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// requires Callable<T, ArgTypes...> && Convertible<Callable<T, ArgTypes...>::result_type, R>
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// T*
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// target();
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// template<typename T>
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// requires Callable<T, ArgTypes...> && Convertible<Callable<T, ArgTypes...>::result_type, R>
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// const T*
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// target() const;
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#include <functional>
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#include <new>
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#include <cstdlib>
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#include <cassert>
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#include "test_macros.h"
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class A
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{
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int data_[10];
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public:
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static int count;
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A()
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{
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++count;
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for (int i = 0; i < 10; ++i)
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data_[i] = i;
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}
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A(const A&) {++count;}
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~A() {--count;}
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int operator()(int i) const
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{
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for (int j = 0; j < 10; ++j)
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i += data_[j];
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return i;
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}
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int foo(int) const {return 1;}
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};
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int A::count = 0;
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int g(int) {return 0;}
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int main(int, char**)
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{
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{
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std::function<int(int)> f = A();
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assert(A::count == 1);
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assert(f.target<A>());
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assert(f.target<int(*)(int)>() == 0);
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assert(f.target<int>() == nullptr);
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}
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assert(A::count == 0);
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{
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std::function<int(int)> f = g;
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assert(A::count == 0);
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assert(f.target<int(*)(int)>());
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assert(f.target<A>() == 0);
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assert(f.target<int>() == nullptr);
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}
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assert(A::count == 0);
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{
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const std::function<int(int)> f = A();
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assert(A::count == 1);
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assert(f.target<A>());
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assert(f.target<int(*)(int)>() == 0);
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assert(f.target<int>() == nullptr);
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}
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assert(A::count == 0);
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{
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const std::function<int(int)> f = g;
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assert(A::count == 0);
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assert(f.target<int(*)(int)>());
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assert(f.target<A>() == 0);
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assert(f.target<int>() == nullptr);
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}
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assert(A::count == 0);
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return 0;
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}
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